Bead-building machine



Jan. 18,1927. l11615925 A. H. MARIETTA BEAD'BUILDING MCHINE Filed Dec.22. 1920 4 Sheets-Sheet 1 Jan. 18,1927. 1,615,025

A. H. MARIETTA BEAD AHummm MACHINE Filed Dec. 22, 1920 4 sheets-sheet 21Z0/101750 HMM/dn @w @a/M I Jan. 18,1927. l 1,615,025

A. H. MARIETTA BEAD BUILDING MACHINE Filed De. 22, 1920 4 Sheet-Sheet 3Jan. 18,1927. 1,615,025 A A. H. MARIETTA BEAD BUILDING MACHINE FiledDeo. 22. 1920 4 Sheets-Sheet 4 d .y Z294 Rg? mmm Patented Jan. 18, 1927.

y UNITED STATES PATENT OFFICE.

ALPHONSO H. MARIETTA, 0F .iIItOlXy OI-IIO, ASSIGNOR TO THE GOODYEAR TIRE& RUBBER COMPANY, OF AKRON,` OHIO, A CORFOBATION OF OHIO.

BEAD-BUILDING MACHINE.

Application led December 22, 1920.

My invention relates to bead building machines, and it has particularreference to machines for buildin-g composite bead rings of annularform;

The objects and advantages that may be derived from practicing myinvention will be apparent from a study of the specification and theappended claims which constitute a portion of this application.

Like symbols of reference indicate like parts in each of the figures ofthe accompanying drawings;

Figure 1 of which is a side elevational view of a machine embodying myinvention;

Figure 2 is an end elevational view, partially in section', of thebead-building portion of the unit shown in Figure 1;

Figure 3 is an end elevational view of the fabric supply rack shown inFigure 1; y

Figure 4 is a top plan view of the supply rack shown in Figure 3;

Figure 5 is anend elevational view of a fabric supply arm of the fabricsupply rack shown in Figure 3;

Figures 6 and 7 are sectional elevational views taken substantially onlines 6 6 and .7--7 of Figure 4;

Figure 8 is an enlarged side elevational view partially in section, ofone of the bead building tools applied to a partially formed bead ring;

Figure 9 is a sectional view of the bead form or mold and anaccompanying partially formed bead ring contained therein and in theprocess of construction;

.Figure 10 is a cross sectional view of a partially formed bead ringshowing` the elements entering into its assembly and their relativepositions;

Figure 11 is a .sectional view of a completed bead ring; and

Fig. 12 is an enlarged fragmentary sectional .view showing theapplication of the positioning roller in the process of building a beadring.

The machine for practicing my invention, which is shown in Figures 1 and2 of the drawings, embodies a rotatable table 1() having a bead form ormoldring 11 mounted thereon to which the material for building the beadring, which generally consists of a number of strands of steel wire, afiller material and a fabric covering, is supplied from a supply rack12. The ma- SeI'ial No. 432,4?5.

terial thus supplied to the bead mold is subsequently molded by means ofa positioning tool 13 and a shaping tool 14 that are mounted on a frame15 which also supports the rotatable table 10. An electric motor 16, orother suitable device, is adapted arbor 19 by means of interposed ballbearing raceways 22 and 23 that are accurately positioned and secured inplace by means of an interposed sleeve 24 and a lock nut 25. A mastergear 26, which is secured to the hub portion of the table 10,V is drivenfrom the motor 16 through a motor pinion 27 `and a gear train 28 which'terminates in the driving pinion 29. A housing 30 encloses the'mastergear 26 and the pinion 29. `A dust ring 33 is secured to the rotatabletable 10 to prevent dust and foreign material from entering the ballbearing raceways.

The mold ring 11, which has an angular molding groove 31 in itsperiphery, is removably secured to the rotatable table 10 by means of aseries of dowel pins 32.

The arbor 19 also has a standard 36 secured thereto by-means ofa key 37and alock nut 38. The standard 36 support the shaping devices 18 and 14.The'positioning device 13, which isrshown most clearly in Figures 1 and9, has a roll 39 rotatably mounted on one end of a pivoted arm 40,thatis connected to a stationary bracket 41'by a bearing pin 41a. A handlever 42 provides means for moving the roll 39 into and out ofengagement with the grooved mold ring 11. The positioning roll 39 has apair of frustoconicalangularly related faces 39"L and 39b thatrespectively'correspond to the face of the molding` groove and aradially extending annular shoulder 39c for a purpose later to bedescribed.

The general construction of the shaping device 14 is substantially thesame as that of the device 13 with the exception of an auxiliary guideroll 45 and the shape of the periphery of the roll 46. The auxiliary Theshaping roll 46, which issmountedlon..

the arm 47, embodies a molding face 46a,

the elements of Which; are@ substantially.;

parallel to the axis of the roll, and a pair oguide faces 469i* and46t'hatrrespectively.` enggrggeftheav adia centr side' Walls otft'het1moldv ing; groove fwherr theV roll 46 is moved.y tonits operative'position.- byf the hand'v leven 49 as show-nain Figures- 11 and` oit'the drawings: bearing pin: 50 constitutes ai support lior. the roll 46and a bearing pinals serves Y'asa mountingV fonthe movable' arm` 47.Yon: the stationary` bracket,` 52;' Thev described methodff of" mounting'the shaping' devices 13 and? 1'41y on 1 the standi 36 insures; tlieproper cooperation ot the shaping rolls 39fanda 46 Witliithemoldinggroove when the rolls. ocL cupy` their# respective operative positions.-

The operation of the motor 16 isf con:-` trolled through the agency ot'ai. treadle switch: 55,Y that` governs the loiv` speed. roperationfotth'ei motor,. and la: pair ofi pushfbutL ton'zsvvit'ch'es: 561 and 157 that: arey respectively adaptedto. control tli'e. starting.Aandstopping of?? the high. speed?! operation; or the?4 motor. 'EherHcontrol switches 56 and 57 arezenclo'scd in ahousingSl that is mountedonithesstand 36.5? by means of abracket 59. The conductors tli'at:connect the switelresz561,and-` 57 Withzthe-motor control circuit',v arelodi from theI casing 58 of.Y the; puslr button# switches through theconduit;` 61 tothe mainrsivitclres (noti. shown).4 orfeiictiiig'f theoperation` ot the motor: in; accordance. with conventional practice.4The-motori 16l is mounted Ton.. the base. 18?' in* Such; manner asto bepantiallyI enclosed by: the.l :trame 1f5 Vwhich@ proividesa compact?and; neat arrangement` otthemachine parts;

Tlhe' supplyf rack; 12:.; which is shown.: in Figures; 1,: to. 7.Vinclusive, oil?Y the drawings. embodies' pain' ois supply rolls 7T0and.71 that, are removably mounted in;- Utbmclets 72' andli73 and Whiclnrespectively supply.Y a fabric: strip 74 andv a' metallic reinforcinglstripi 7 to'tli'e molding; groove 31?.

take`l up'.` roll' 7.6` receives the cloth'v liner tliat is intenposedf4between layers oit. the fabric strip-74% as: it: is unWoundfrom: thesupply.. roll; 702 and".l delivered toa= fabric guide -member 7 7 5.overl an -idlenfroll 7-8- that is :rotatably mountedronfai swingable f2111111179.

bearing" pint Slservesto pivotally connect the arm 79 to the rack12.:insuclnmannen asitor permitfztiie; arm 79to: swing laterallyA af.considerabley degree.. A guide bracket 81 on Whichithefgnide=77 ismountedgis adjustablyi securedltothe arm 7'9` in such; mannerfthat itmaybe angularly adjusted' relative to the. arm 7.9. The bracket 81 has anadjustable stop i S3 that.. engages: thea-cylindrical side Wall 84 ofthe rotatable table l0 to properly position the fabric supply guide 77relative to the moldin'gjgroove` 31"ot""tlie mold ring` 11 when' thevarm 7`9"'occupies its operative position. The pivotal mounting ofthe arm79 allovvs it to be swung away fromthe nioldW-hennot supplyingmaterialthereto.

The ,guide bracket 81. carries ananglef arm 85 thatsupports a. setfofguide rolls S6 at itsextremity which are held in place 'means of a bolt87. The ,set of guiderolls 86: serve to4 control. the angle at.L whichthe reinforcingstfri p 7 which.. is of. rectangularcross section; isintroduced i nto; the. moldngjgroove-BL from/the supply.. roll,71. Apair of irustro conical. rolls 88 and 89E-are mountedin. invertedsideby. siderelation. Theroll. 89 has; a laterally extending: annu larflange 9() that detines-A anA aperture be.- tween the rolls throughwhichthe reinfore ingfstrip extends inpassing;Y to the periph.- eralgroove of the mold as illustrated.` in Figure-5 oit the drawings.'lhe'braclteti S5 andl the supply guides77are securcdin .place by apair-'otthrough bolts-91: andlQ.:

fr; take uproll .9i-3 rece-ives-thecloth liner that4 is interposedbetween successive layers ot the reinforcingn strip 7.5 as'it' isunwound from the roll 71. Ay tension. roll. 94, over which; theneint'orcingstrip 7.5 passel.v has an.` adjustable tension devicel 95of. usual .type employed in machines of this general. char.- actera andavpanl 4and ratchet device 96that permits of.; reverse movement ot thelroll` 94 to adjust the tension of the strip 75 as it issupplied t0 `the`:groove 31 otthe molde-ing 1.1.. The strip 75 extends over air idler.roll 971,4thatis most clearly shown iniFifLures l and 3 of the drawings.to the deliver.)Y rolls 86.- The Yguide roll. 97I issupported betweenparallel; ar-mso'f. a bracket 98'- by. means ot a bearingpinQQ. A. guidebloclelOOl bridges the arms of the bracket98 to .confine 'the re.Iinforcing stripvtothe guide roll.

An: auxiliary rollv101. is' mountedl on a ,laterally extending,bearingVv pin 1.02', that is supported by a bracket 103.1rom-tlicsnppllvv rack 12'andserves Vas asupportfor aroll ot filler material 104that` is e1in' lo. \red`in the building, ot a bead ring;

The materials trom. which a, prf-terrml form of bead ring. which isshown in cross section in Figures 8 to 11 inclusive,. otfthe. drawings`may.. be consti'ructed,.includestlic. fabric strip-74.thereinforcingstrips 7b and the stripsotiiller materiallllt., Tlietabricstrip-74 is a. suitable. Width ot cloth that has been calenderedtoimpregnate it withrubber in. a manner familiar to those'slilled in theart.. rEhis fabric strip constitutes the coverin for the bead' ring.Thereintorcingstri p 7 iscomposed` ofV loosely braided, strands Ll (l ofsteel wire, which, in their assembled form, are thoroughly impregnatedwith rubber. This reinforcing element is of rectangular cross section asshown in the drawings. The filler material 104 is of any desirablerubber composition which may be employed in the construction of thering.

The operation of my device takes place substantially as follows: Rolls7() and 71 of suitable fabric 74 and reinforcing material 75 are placedin the brackets 72 and 7 3 of the supply rack 1:2 and the strip offabric 74 is led over the take up roll 76 to which the cloth liner forthe fabric strip 74 is attached, over the idler roll 7 8 and through thefabric guide 77 to the molding groove 3l. The reinforcing element 75 isled over the take up roll 93 to which the cloth liner is attached overlthe tension roll 94 which is adjusted to impose the proper tension onthe reinforcing strip, over the idler roll 97 and between guide rolls 8Sand 89 to the mold groove. j

The operator now treats the molding groove'l and its adjacent faces withrubber' cement, or other substance that insures proper adhesion of thefabric strip with the surface of the moldino groove, places the end ofthe fabric strip 4 in proper position relative to the molding groove 3land effects the rotation of the mold ring 1l by depressing the foottreadle 55. When a complete layer of fabric is wound on the mold ringthe fabric is severed and the ends joined in such manner that the end ofthe strip initially secured to the ring ll becomes the uppermost end ofthe overlapped ends of the fabric strip.

The end of the reinforcing element 75 is wound with a narrow strip oftape, or other material9 to prevent the unraveling of the steel wirestrands and to insure their proper engagement with the fabric strip. Themold is again rotated by the depression of the treadle switch 55 and twolayers of the reinforcing element 75 are forced into engagement with thevertical molding vsuri1 ace of the groove 31 by pressure on the handlever 42. This forces the positioning roll 39 into operative positionwith reference to the molding groove. The annular flange 39c of the roll39 engages the uppermost edge of the reinforcing strip as it isintroduced from the guide rolls 86 into the molding groove in angularrelation to the molding face to insure the proper positioning ofthestrip in the groove bv downward pressure from the flange 39c and lateralpressure from the roll face 39D. This relation is clearly shown inFigure l2.

Since the reinforcing element 75 is quite pliable, and since it is alsoimpregnated with uncured rubber gum that? is very tacky, it must beplaced exactly where it belongs inimediately upon its introduction intothe groove. By introducing the element 75 at an angle to the face of themold, the lowermost inside edge first engages the inside corner of themold. The operation of the roll 39 forcesthe strip securely into thecorner of the mold and then lays the strip against the side of thegroove. In this way, the strip is positioned without the necessity ofsliding the strip along the fabric 74 or wrinkling the fabric in aneffort to properly position the strip after it is in engagementtherewith. It is also very difficult to obtain a secure seating of thetop flange 39 of the roll on the top of the strip, if the face of thereinforcing strip is parallel with the face 391 of the roll.

Vhen two layers of the reinforcing elements 7 5 are wound on the moldingring l1, a narrow strip of tape. is wound about the reinforcing` element75 which is then severed at the point where the tape is located toprevent unraveling of the wire strands and the mold is again rotatedwith the roll 39 firmly pressed against the two layers of reinforcingelement as shown in Figure 8 of the drawings.

Two layers of filler material 104 of different widths are now woundalong the bottom edge of the strips of reinforcing material and a finallayer of the reinforcing strip 75 is wound in angular relation to thefiller strips and the previously applied reinforcing strips, as shown inFigure 10. The last mentioned layer of reinforcing element is wound intoproper relation withthe previously applied elements by means of theauxiliary roll 45 which introduces the reinforcing strip at a desirableangle to the shaping roll 46. The bead ring is formed .to the contour ofthe molding groove by means of the roll 46 to which pressure is appliedthrough the hand lever 49. The guide faces 46b and 46c of the roll 46insure proper size of cross section of the bead ring so built up, andalso properly position the final layer of reinforcing element that isintroduced into the molding groove.- The manner of engagement of theguide faces of the roll with the mold groove is clearly illustrated inFigure 2 of the drawings.

The mold ring is now rotated at its high speed by .depression of thepush button switch 56 and the edges of the fabric strip 74 aresuccessively folded over the assembled reinforcing and filler elementsby the use of suitable hand tools such as are employed by those skilledin the art in similar operations. The bead ring so assembled is nowfinally formed and sized by prop-er pressure on the roll 46 prior to itsremoval from the molding groove 3l. This latter operation may beaccomplished by inserting a stitching wheel or knife (not shown) beneaththe fabric of the bead ring, to liftit from the groove.

'Ehe :semior complete.l vuloanization ofthe beadfv ring;v thus:const-rnctedgtinishes the: bead ring: anch` prepares thesame: ton useinthe manut'aotureaV of tire casi-rigs.1

It willi be obvious that the, arrangement anderelation-of partsinthemachine herein disclosedV may be;v altered Without departing fronrthe spirit andi scope of.- my invention and; I desireA therefore thatonly such l limit-ations'fshall be imposed asY are indicated in the.Aaccompanying-,1claims.

lVhat.Y I claim! is:

LA machine for building; bead; rings comprising a rotatable andperipherally grooved formi adapted to receive the compo nent elements ofthe bead riiigfa1'olliadapte edfto swingl'aterally relative `to said,groove to; operative relation-` with. the peripheral groove, sai dfroll'rhagving-K a flanged periphery adapted to: posit-ion, thematerialintroduced intothe periph-eral groove: of; themold, and al, guideradapted to dir-ect thev component elements of the' beadf ring4 betweenthe roll and the foi-frm, said guide being swingable toward andav aavayfrom. said form.

2. A machine for building bead; rings Comprising-y as rotatable table,-al peripherally grooved mold, mounted t'hereon and rot-atedthereby,means` for introducing; a component element of? the bead ring inangnlarfrelationV to i the` molding groove, a shapingzjroll mounted in;detinitel operative relation with the peripheral groove and adapted toengage andl posit-ion` the introducedv element'in: parallel relation iwith the sidewall, of the groove.

3: in machine fon building; beadv rings comprisingqa rotatablel table,a-:peripherally gnoovedf: mold mountedf thereon and rotated thereby,.astitching roll mountedwin definite operative rel'ati'olr withtheperipheral gnooveea device for supplying material' to the'y moldingcavity., and adjustablemeans forrop'erativelyl positioning` said:dev-icc relaF tive `to thev molding cavity.

4,; A; machine for building; bead ringe comprising a rotatable table, aperiphcrally grooved mold mounted thereon and; rotated thereby, ashapingv tool: mountedf indefinite operative relation ivi-th theperipheral groove and adapted to cooperate therewith, a device forsupplying material to theyperi'phe al groove, and adjustable meansengaging theiperiphery'oftthefmold for-main'- taining the supply-deviceVinfproperoperative relation to the mold.

5..A1 machine forA building' beadz rings comprising a rotatable table,aperipherally grooved mold mounted thereon andlrotated thereby, ashaping tool mountediin deli'nite operative rela-tion:v with theperipheral groove and adapted tolcooperatetherewith,

a: protally. mounted-I arm. adapted to guide material suppliedL to the:groove, a guide member mounted on the` extremity' of said arm, meansfor. angularly adjusting the guide member relative tothe pivotal arm,and means adapte-d to y engageI the, periphery, of said mold foradjusting; the relatioin between the guide member. and said mold'.

6; rmachine: for building annular rings which comprises if a. revolubleform-` having a peripheralV groove, means for supplying' a hat. str-ipof material to` t'heiorm, a, tool carriedi by a'-` stationary partofthe-machine and manually movable into,V operative-f en*4 gagement withthe; mold, said tool being adapted to sin'iultaneously arrange the stripof material Within themold and to apply moldingpressure theretoy andA`second tool similarly mounted and adapted toshape the material and toapply molding pressure thereto, said'` tools` being ad apted to be usedin a. prearranged order.

7. A machine for building bead ringsfoomprising; a` rotatable memberhaving a peripheral groove corresponding in profile-to t-Wo'sides oiiiabead ring, means for rotating the member, means for supplyingrespectively a metallic reinforcing element,.af strip offiller materialandi aI stripof, fabricused in the building'ot said bead, and ai guidearm swingable into-and out of.l operative -rclation W-itlrsaid rotatablemember, aV roller adapted to press they component elements ofsaid beadrings into-the peripheralgroove of, said. rotatable member, said guidefhaving'v inde pendentl means for respectively directing saidreinforcingelement and said: fabric strip between the rotatable memberAand1 said roller;

8: A machinel for building bead' rings comprising a rotatable memberhaNing a peripheral groove corresponding inprolile to two sides of abead, means for` rotating said: member, a positioning roller adaptedtoiposition'eaohcomponent-,part oi' said bead l in.I deinite relation tothe remaining parts ofi said bead, and a finishing roller of materiallydifferent` contour adapted to-inish the outersurfaceof, the said bead.

9.1A1 machine forl building bead rings comprising a rotatable memberadapted to receiveV axbead reinforcing strip and having av peripheralface corresponding in prole toithe'insidefface of the-bead; ring,v meansfor. supporting and. rotatingv said.v member, andl means adapted topositiony saidi reinforcingstrip laterally of the rotatable member.

In' Witness whereof, I' have hereunto signed my name.

ALRHQNSO H. MARIETTA.

